Spojovacie prvky, siete a systémy
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- Alvin Bond
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1 Širokopásmové spojovacie systémy Spojovacie prvky, siete a systémy doc. Ing. Martin Medvecký, PhD. ATM spojovacie prvky Požiadavky na ATM spojovacie siete Parameter Požiadavka Maximálna rýchlosť 600Mbit/s (0Gbit/s) Záťaž externej linky 0,8Erl Počet externých liniek niekoľko tisíc Blokovanie bez blokovania Typ spojenia bod-bod, multicast Čas zostavenia spojenia niekoľko milisekúnd Počet spojení v HPH Pravdepodobnosť straty bunky < 0-0 Prenosové oneskorenie < 0,5 ms Jitter < 0,2 ms ZS 20/2 ŠpSS V / ZS 20/2 ŠpSS V / 3 ATM spojovacie prvky Požiadavky na ATM prepínače Flexibilita v prepájaných rýchlostiach Vysoko-kapacitná spojovacia sieť Minimálne prenosové oneskorenie Konštantné prenosové oneskorenie Bezporuchová prevádzka Bez blokovania Multicast/broadcast Nezávislosť na službe ATM spojovacie prvky Prepájanie ATM buniek v uzloch ATM X Z X spojovacia A X B sieť A X X Data C Z X Hlavičky Smerovacia tabuľka Smerovanie & radenie ZS 20/2 ŠpSS V / 2 ZS 20/2 ŠpSS V / 4
2 Vstupné porty ATM spojovacie prvky Architektúra ATM prepínača Spojovacie pole Sekundárna rovina Výstupné porty Vstup y Zbernicové rozhranie Bunkové filtre Spojovací prvok Knockout Primárna rovina 2 2 Koncentrátor Posuv (rotácia ) N N FIFO pamäte Riadenie Výstup ZS 20/2 ŠpSS V / 5 ZS 20/2 ŠpSS V / 7 Koncepcia Spojovací prvok Knockout Spojovací prvok Knockout Pravdepodobnosť straty bunky v závislosti na počte výstupov koncentrátora L 2 ZR ZR ZR Výstup y 2 N ZR - Zbernic ové rozhranie raty bunky Pravdepodobnosť str N=6 N= Počet výstupov koncentrátora (L) N=32 ZS 20/2 ŠpSS V / 6 ZS 20/2 ŠpSS V / 8
3 Spojovací prvok Knockout Spojovací prvok Knockout Koncentrátor Koncentruje N vstupov koncentrátora na L výstupov (L N) Ak L je dostatočne veľké (napr. 2), pre akékoľvek N je dosiahnuté CLP = 0-0 Používa spínače 2x2 Číslo linky Prvá bunková perioda 0 - prázdna bunka - bunka s informačným obsahom Druhá bunková perioda Posuvný register Víťaz Porazený ZS 20/2 ŠpSS V / 9 ZS 20/2 ŠpSS V / Vstupy Spojovací prvok Knockout Koncentrátor Koncentrátor Spojovací prvok Knockout Matematický zápis Ak S i označuje počet pozícií o ktoré majú byť posunuté výstupy koncentrátora v bunkovej periode i, potom S i+ = (S i + k i ) mod L Zavrhnuté bunky kde k i je počet neprázdnych buniek ktoré prišli v bunkovej periode i. Na začiatku S = 0. Výstup y ZS 20/2 ŠpSS V / 0 ZS 20/2 ŠpSS V / 2
4 Spojovací prvok Knockout Expanzia Spojovací prvok Coprin Bloková schéma elementu Riadenie Bunka Vstupy Výstupy Super multiplexor Časová základňa Pamäť Demultiplexor ZS 20/2 ŠpSS V / 3 ZS 20/2 ŠpSS V / 5 Spojovací prvok Coprin Spojovací element Coprin Vyvinutý francúzskym CNET SE s centrálnou vyrovnávacou pamäťou Smerovanie buniek v elemente - na základe informácie uloženej v hlavičke bunky (tzv. reference number) Štyri základné stavebné bloky: supermultiplexor pamäť demultiplexor riadenie c 3a Spojovací prvok Coprin Supermultiplexor - princíp činnosti Priestorový spínač S b a c b a Hlavičky 2c 2b 2a 2c 2b 2a 4 stavy segment a 2a 3a 4a 3c 3b 3a 3c 3b segment b 3b 4b b 2b 3b 4b 4a 4c 4b 4a 4c segment c 4c c 2c 3c 4c S Stavy spínača Stavy spínača a 2a ZS 20/2 ŠpSS V / 4 ZS 20/2 ŠpSS V / 6
5 Spojovací prvok Coprin Supermultiplexor - štyri stavy S S S S Pre spínač N x N platí: V stave k vstupu i odpovedá výstup (i + k - ) mod N Demultiplexor Pracuje opačne ako supemultiplexor Má tiež štyri stavy - opačné poradie Riadenie Spojovací prvok Coprin Založené na translačnej tabuľke - hlavička bunky so smerovacou informáciou (reference number) a adresa výstupnej linky Zabezpečuje správne vyčítanie a radenie buniek z centrálnej pamäte. ZS 20/2 ŠpSS V / 7 ZS 20/2 ŠpSS V / 9 Pamäť Spojovací prvok Coprin Spojovací prvok Prizma Spojovací element Prizma A A A A Pamäť S Časová základňa Vyvinutý v IBM Má samosmerovacie schopnosti SE s výstupným radením buniek - výstupné pamäte sú zdieľané viacerými výstupmi - má vlastnosti centrálneho riadenia Nie je obmedzený len na prepájanie ATM Pracuje s rýchlosťami rádovo Gbit/s Centrálny rad v pamäti je organizovaný do definovaných pamäťových elementov (tzv. banks). Každý segment bunky má presne určený bank a polohu v ňom. ZS 20/2 ŠpSS V / 8 ZS 20/2 ŠpSS V / 20
6 Principiálna schéma Spojovací prvok Prizma Spojovací prvok Prizma Konvenčný spôsob ukladania buniek do vyrovnávacej pamäti Vstupy SJ Pamäť Výstupy Pamäť VsR VyR et ket pak pak VsR VyR N i N 0 pake et N i SJ SJ - Smerovacia jednotka N 0 VsR - Vstupný register Hĺbka VyR - Výstupný Register Jedna bunková perioda - N i zápisov do a N o čítaní z pamäti ATM bunka = 424 bitov, T ACC = 20 ns => max 622,5 Mbit/s ZS 20/2 ŠpSS V / 2 ZS 20/2 ŠpSS V / 23 Spojovací prvok Prizma Fyzická štruktúra elementu Dátová časť Spojovací prvok Prizma Prizma - spôsob ukladania buniek do vyrovnávacej pamäti Pamäť M S SJ N i N 0 Hĺbka Pamäť paket paket Zápis Čítanie do z pamäti pamäti N i paket Hĺbka N 0 Routing Tag Riadiaca časť Interná rýchlosť elementu je závislá len na rýchlosti vstupu a je nazávislá na počte vstupov ZS 20/2 ŠpSS V / 22 ZS 20/2 ŠpSS V / 24
7 Spojovací prvok Athena Spojovací element Athena Vyvinutý v Alcatel Bell (Belgicko) SE s radením buniek na vstupe Smerovanie buniek v elemente - na základe informácie uloženej v smerovacích tabuľkách Veľkosť elementu: 6 x 6 Vstupy/výstupy: 600 Mbit/s Kapacita spínača: 9,6 Gbit/s Spojovací prvok Athena ZS 20/2 ŠpSS V / 25 ZS 20/2 ŠpSS V / 27 Spojovací prvok Athena Spojovací prvok Athena Vstup T RTP T - smerovacia tabuľka Dáta 8 6 Adresa CMC Athena CMC RTP Výstup T 6 6 CMC 2 Vstup 6 Výstup 6 RTP Dáta 8 Adresa 6 CMC 8 6 RTP - Receive and Transmit port Riadenie CMC - Central Memory Chip ZS 20/2 ŠpSS V / 26 ZS 20/2 ŠpSS V / 28
8 Spojovací prvok ISE Spojovací element ISE (Integated Switching Element) Vyvinutý v Alcatel SEL SE s centrálnou vyrovnávacou pamäťou Smerovanie buniek v elemente - na základe informácie v hlavičke bunky (routing tag) - má samosmerovacie schopnosti Má multicast a broadcast funkciu Veľkosť elementu: 32 x 32 (staršia verzia6x6 ) Vstupy/výstupy: 50 Mbit/s Kapacita spínača: 4,8 Gbit/s (2,4 Gbit/s) ISE - smerovanie Spojovací prvok ISE Smerovacia logika implementovaná ako zreťazený procesor (pipeline processor) ISE podporuje p viaccestné MIN => smerovacia informácia v hlavičke bunky (routing tag) určuje: priame smerovanie - bunka je určená len pre jeden výstup z elementu distribučné smerovanie - bunka je smerovaná na skupinu (4, 8, 6, 32) výstupov z elementu ZS 20/2 ŠpSS V / 29 ZS 20/2 ŠpSS V / 3 ISE - architektúra Spojovací prvok ISE MSC - Multi-Slot Cell Spojovací prvok ISE Vstupy 32 S/P S/P ZR ZR Smerovacia logika MUX SBM Riadenie ZR - Záchytný register SBM - Centrálna pamäť DEMUX S/P S/P 32 Výstup py ISE používa vlastný, interný formát bunky - MSC (64 bitov) ATM bunka je rozdelená na 8 MSC Multi-slot bunka Bunka Prídavná informácia Bunka ZS 20/2 ŠpSS V / 30 ZS 20/2 ŠpSS V / 32
9 Mutli-slot bunka Spojovací prvok ISE MSC MSC 2 Slot... Slot n+ Idle Slot Idle Slot Slot Riad. pole Inf. pole číslo bitu 0 0 A : Datový slot 0 0 A : Prvý slot z MSC A : Idle slot paritný bit Formát SRT slotu Spojovací prvok ISE SC FNC R TPC R RCA/TRN R (M)ERN TSTP SEC SC - Slot Control FNC - Function Code TPC - Transfer Pattern Code RCA - Routing Control Address / TRN - Tree Reference Number (M)ERN - [Multicast] Expansion Reference Number TSTP - Time Stamp SEC - Slot Error Check ZS 20/2 ŠpSS V / 33 ZS 20/2 ŠpSS V / 35 Formát MSC (ATM bunka) Spojovací prvok ISE 00A FNC R TPC R RCA/TRN R ERN TSTP SEC 00A adaptačné pole GFC VPI VPI VCI PTI 00A BYTE BYTE 2 BYTE 8 00A BYTE 9 BYTE 6 00A BYTE 7 BYTE 24 00A BYTE 25 BYTE 32 00A BYTE 33 BYTE 40 00A BYTE 4 BYTE 48 C L P SEC ATM MIN ATM viacstupňové spojovacie siete Rozdelenie podľa času určenia smerovania bunky v sieti: spojovo orientované MIN bunkovo orientované MIN miesta uloženia smerovacej informácie: informácia uložená v sieti (v smerovacích tabuľkách) informácia je časťou bunky (routing tag) ZS 20/2 ŠpSS V / 34 ZS 20/2 ŠpSS V / 36
10 Spojovo orientované MIN ATM MIN MIN (Multi-Path Self-Routing) Logické spojenie určujú len raz pre trvanie celého spojenia Všetky bunky v rámci jedného spojenia budú používať tú istú cestu cez sieť Je zaručené správne poradie buniek pri východe zo siete Používa prvky ISE Spojenia bod-bod: samosmerovanie - určenie cesty pre každú bunku samostatne, smerovacia informácia nesená bunkou Multicast spojenia: určenie cesty pre každú bunku samostatne, smerovacia informácia uložená v smerovacích tabuľkách Max. konfigurácia: portov 55,520Mbit/s ZS 20/2 ŠpSS V / 37 ZS 20/2 ŠpSS V / 39 ATM MIN Bunkovo orientované MIN - modul Rozhodovacia informácia je nesená v bunkách Rozhodovací proces pre smerovanie sa vykonáva počas prechodu bunky na základe informácií ktoré sama nesie Jednotlivé bunky v rámci jedného spojenia môžu využívať rôzne cesty v sieti --> možnosť preusporiadania buniek --> potrebné zoradenie buniek (resequencing) na výstupe zo siete Vstu upy 600 Mbit/s 32 bit/s 50 M ISE ISE ISE ISE ISE ISE ISE ISE 50 Mbit/s tupy Mbit/s Výst 600 M 32 CLR pre modul < 0 - ZS 20/2 ŠpSS V / 38 ZS 20/2 ŠpSS V / 40
11 - spojovacia sieť Alcatel 000 S2 - originálna konfigurácia 8 Vstupy 2 28 TSi 6 PSi PS2 PSo 4 4 ASi 4 64x64 28x28 64x64 4 ASo TSo 64x64 64x64 64x64 28x28 64x Rovina x64 28x28 64x x64 64x64 64x64 28x28 64x64 6 TSU Rovina 6 8 Výstupy 2 28 AS: GS: SDH-STM 55 Mbit/s Access Switch Group Switch MUX/ DEMUX 2 Mbit/s Interface DDF (Digital Distribution Frame) Access or Interoffice AS 63 GS 2 Mbit/s n x 64kbit/s Subscriber Lines analogue/isdn ZS 20/2 ŠpSS V / 4 ZS 20/2 ŠpSS V / 43 - dimenzovanie Náhrada DSN za MPRS portov: 3 stupne záťaž 0,6 Erl: 2 rovín záťaž 0,8 Erl: 6 rovín 024 portov: 2 stupne 256 portov: stupeň Záťaž externých liniek: 0,8 Erl AS: IWLK: : Access Switch Interworking Link Multi Path Self Routing switching matrix DDF (Digital Distribution Frame) AS IWLK 63 2 Mbit/s n x 64 kbit/ss Subscrib analogu NaN a Cont Záťaž interných liniek: 0,4 Erl SDH- STM 55 Mbit/s MUX/ DEMUX Access or Interoffice ZS 20/2 ŠpSS V / 42 ZS 20/2 ŠpSS V / 44
12 Pripojenie SDH Alcatel-Lucent 7670 RSP AS: IWLK: : SLK: SBCE: SDH - STM 55 Mbit/s Access Switch Interworking Link Multi Path Self Routing switching matrix SDH/ SONET Interface SDH/ SONET to B-channel Conversion Element SBCE SLK Access or Interoffice AS IWLK 2 Mbit/s n x 64 kbit/s Subscriber Lines analogue/isdn Narrowband Control Elements Kapacita SBCE = 560 kanálov škálovateľný ATM prepínač/smerovač MIN:, bezblokádové, redundanté + škálovateľné 2,4-450 Gbit/s podpora IP/MPLS, ATM, TDM, FR, Gigabit Ethernet, G.SHDSL, 0/00 Ethernet, POS SVC/s (0 mil. spojení v HPH) porty: max. STM-6 smerovač: ciest mil. paketov/s ZS 20/2 ŠpSS V / 45 ZS 20/2 ŠpSS V / 47 AS: IWLK: : SLK: SBCE: TLK: ABCE: Access Switch Interworking Link Multi Path Self Routing switching matrix SDH/ SON ET I nterfa ce SDH/ SONET to B-channel Conversion Element ATM Interface ATM to B-channel Conversion Element SDH- STM 55 Mbit/s SBCE Access or Interoffice AS Alcatel 000 S2 NB/BB SLK NB/BB Control ATM Term. IWLK ABCE IP routing 2 Mbit/s n x 64 kbit/s Subscriber Lines analogue/isdn Narrowband Control Elements Alcatel-Lucent 7770 RCP škálovateľný IP/MPLS prepínač/smerovač MIN:, bezblokádové, redundanté 3+ škálovateľné 0 Gbit/s (modul) max 640 Gbit/s (stojan) podpora IP/MPLS, Gigabit Ethernet, POS porty: STM- až STM-64, Gig.Ethernet, 0Gbit/s VSR smerovač: ciest 750 mil. paketov/s ZS 20/2 ŠpSS V / 46 ZS 20/2 ŠpSS V / 48
13 Ericsson Ericsson Ericsson ASX 200BX - architektúra Policing & Multiplex. Mux -8 I/O portov Pamäť na buniek Pamäť na VC podporuje obidve GCRA UPC funkcie f k i ktoré def. ATM Forum Ericsson ASX architektúra Fabric 4 Fabric 3 Fabric 2 Fabric Zdielaná pamäť 2 Mux 2,5 Gbit/s Switching Fabric Zdielaná pamäť -6 I/O Porty Sieťové moduly ZS 20/2 ŠpSS V / 49 Distribuovaná zdielaná pamäť Pamäť na výstupe o veľkosti ľk ti , buniek / port ZS 20/2 Sieťové moduly 4 3 Policing & Multipl. Zdielaná pamäť 2,5 Gbit/s Switching Fabric 4x2,5 Gbit/s zbernice Ericsson ŠpSS V / 5 Ericsson Ericsson ASX 200BX Ericsson ASX 000 Škálovateľný bezblokádový ATM prepínač 2,5 Gbit/s - 0 Gbit/s ( - 4 spoj. prvky 2,5Gbit/s) netmod moduly 4 až 6 netmod 6 x STM-4c 64 x STM-/E3 28 x E Prenosové oneskorenie: < 2 μs 2,5 Gbit/s bezblokádový ATM prepínač 4 netmod moduly prenosové oneskorenie: max. 0 μs ZS 20/2 ŠpSS V / 50 ZS 20/2 ŠpSS V / 52
14 Ericsson Ericsson ASX 4000 Škálovateľný ATM prepínač 0-40 Gbit/s MIN: 0, 20, 30 a 40 Gbit/s bezblokádová distribuovaná TDM zbernica Počet fyzických portov: Max. rýchlosť portov: STM-6 Prenosové oneskorenie: < 0 μs Max VC Max spojení / sek. Pamäť pre buniek ZS 20/2 ŠpSS V / 53 Ericsson Ericsson BXR Rozhrania 768 port. STM-POS, IPA ATM, ATM 768 port. STM-4 POS, IPA ATM, ATM 92 port. STM-6 POS, IPA ATM, ATM 48 port. STM-64 POS, IPA ATM, ATM 480 port. Gigabit Ethernet 48 port. 0Gigabit Ethernet * IPA ATM = IP Aware ATM ZS 20/2 ŠpSS V / 55 Ericsson Ericsson BXR Škálovateľný multiservisný prepínač/smerovač Gbit/s na stojan max. 480 Gbit/s na systém Vhodný pre IP/MPLS a ATM siete Podpora IP/MPLS, Ethernet, ATM Max. 2 mil. spojení Max spojení / sek. BPX 8600 WAN prepínač triedy carrier-class Varianty: BPX 8620 ATM, BPX 8650 multiservisný prepínač - MPLS a IP BPX Universal Service Node širokopásmové, úzkopásmové a MPLS služby ZS 20/2 ŠpSS V / 54 ZS 20/2 ŠpSS V / 56
15 BPX Universal Service Node BPX 860 BCC 4 Škálovateľný IP+ATM WAN Edge prepínač Modulárna architektúra Max. 6 koncentrátorov (MGX Edge Concentr. Shelf) Max portov E Rozhrania: STM-4, STM-, E3, n x E, E, Channel. E, HSSI, X.2, V.35, Ethernet, Fast Ethernet, FDDI CommBus Časovanie Polling Bus In: 4x800Mb/s Out: 4x,6Gb/s Utility Procesor CPU Arbiter MIN 6x32 RAM BRAM EPROM EIA/TIA 232 Ethernet Redundantné ext. časovanie Broadband Control Card MIN zahŕňa funkciu MIN a radiča (arbiter) priestorové pole, Bezblokádové (800Mbit/s /,6 Gbit/s) Podporuje multicast ZS 20/2 ŠpSS V / 57 ZS 20/2 ŠpSS V / 59 Funkčný modul Funkčný modul BCC Arbiter 6x32 MIN BPX 8600 Architektúra Mbit/s,6 Gbit/s Funkčný modul Funkčný modul BCC -4 MIN Veľkosť 6x6 (BCC-3) 6x32 (BCC-4 - novšia) 9,2 Gbit/s 2 portov 800/600 -Mbit/s (max. STM-4) 20 miliónov buniek/s Pamäť buniek/port (na výstupných portoch) Externá záťaž do 0,95Erl! Charakteristika Carrier Routing System - Smerovač do 92 Tbit/s jednostojanový ( šasi,2tbit/s) viacstojanový (-72 šasi) Podporuje STM-256c POS Rozhrania: 52 x STM-256c (40Gbit/s) 4608 x STM 64c 8432 x STM-6c Založený na: SPP IOS XR ZS 20/2 ŠpSS V / 58 ZS 20/2 ŠpSS V / 60
16 Kapacita Jeden CRS- s kapacitou 92 Tbit/s môže: pripojiť každú domácnosť: v USA rýchlosťou 850 kbit/s na Slovensku* rýchlosťou 49 Mbit/s CRS - pripojiť /3 slovenských domácností rýchlosťou 55Mbit/s preniesť obsah Kongresovej knižnice za 4,6 s uskutočniť súčasne 3 miliardy telefónnych hovorov *Počet domácností v SR: Zdroj ŠÚ SR Linkové rozhrania CRS- Kapacita 40Gbit/s Obsahuje vlastnú kópiu relevantnej časti smerovacej tabuľky (2GB) Modul rozhrania zabezpečuje funkcie. a 2. vrstvy možné rozhrania: x STM-256c POS; 4x STM-64c POS; 6x STM-6c POS; 4x 0 Gigabit Ethernet; t 8x 0 Gigabit Ethernett Modular Services Card zabezpečuje smerovanie na 3. vrstve obsahuje 2ks SPP (Silicon Packet Procesor).Charakteristika: ASIC 40Gbit/s bit RISC procesorov na čipe mikrokernelový operačný systém - IOS XR podporuje 3 úrovne prioritných radov max radov (pamäť 2GB) ZS 20/2 ŠpSS V / 6 ZS 20/2 ŠpSS V / 63 Linkové rozhranie Modular services card CRS- - Architektúra MIN MIN CRS- Modul rozhrania Mid Plane SPP SPP S S2 S3 S3 3 stupňová samosmerovacia Benešova sieť Veľkosť 296 x 296 Bez blokovania (vyrovnávacie pamäte) S S2 S3 S3 Redundancia :N Linkové rozhranie Interná rýchlosť 2,5x vyššia Podpora multicastu (2. stupeň) Linkové rozhranie Smerovací procesor Smerovací procesor Smerovací procesor Oddelené rady pre unicast, multicast a riadiace správy ZS 20/2 ŠpSS V / 62 ZS 20/2 ŠpSS V / 64
17 Smerovacie procesory RP (Route Processor) každý RP: vykonáva funkcie riadiacej vrstvy (IS-IS, BGP, MPLS, manažment systému a tarifikácia) vykonáva funkcie riadenia 6 slotového šasi podporuje 4GB DRAM a 40GB HDD CRS- CRS- moduly Single-Port OC-768C/STM-256C POS Interface Module DRP (Distributed Route Processor) dvojnásobný výkon ako RP 2 dual PowerPC (symetrický multiprocesorový CPU cluster) môže byť umiestnený v ľubovoľnej pozícií určenej pre linkové rozhrania RP aj DRP podporujú redundanciu N:M ZS 20/2 ŠpSS V / 65 ZS 20/2 ŠpSS V / 67 6-Slot Line-Card Chassis Route Processor CRS- moduly Charakteristika Smerovač do 322 Tbit/s jednostojanový ( šasi 4,48 Tbit/s) viacstojanový (až šasi) Carrier Routing System - 3 Podporuje nové moduly x 00 GE (IEEE 802.3ba) 4 x 0 GE 20 x 0 GE 40G MSC (Modular Service Card) obsahuje 2 x 40 Gbit/s ASIC 40G FPC (Frowarding Processor Card) ZS 20/2 ŠpSS V / 66 ZS 20/2 ŠpSS V / 69
18 CRS-3 moduly CRS-3 40-Gbit/s Forwarding Processor Card Konštrukcia telekomunikačných zariadení Stojany 9 rack Šírka modulu 9 (482,6 mm) šírka stojana býva 600/800 mm Výška modulov je násobok U (rack unit) Hĺbka ĺ modulu nie je štandardizovaná hĺbka stojana býva 600/800/00 mm Špecifikácia podľa EIA-30-D (Electronics Industry Association) ZS 20/2 ŠpSS V / 70 ZS 20/2 Konštrukcia telekomunikačných zariadení ŠpSS V / 72 Konštrukcia telekomunikačných zariadení Stojany 23 rack Šírka modulu 23 (580 mm) Šírka stojana býva 600/800 mm Rack unit,75 (44,5mm) Výška býva U, 2U a pod Zariadenie je štandardne o /32 palca (0,787 mm) nižšie ZS 20/2 ŠpSS V / 7 ZS 20/2 ŠpSS V / 73
19 Konštrukcia telekomunikačných zariadení ETSI rack Stojany Backplane Má 3 časti: Zóna, Zóna 2 a Zóna 3 Výška 2200 mm Šírka 50/300/600/900 mm Hĺbka 300 mm ( SHALLOW ETSI Rack) 600 mm (( DEEP ETSI Rack)) Merná záťaž by nemala prekročiť: Stojan rátane internej kabeláže: 5 kn/m2 - štandardne 20 kn/m2 - max. Kabeláž s podpornou časťou: 3 kn/m2 - štandardne 2 8 kn/m - max. Špecifikácia podľa ETSI ZS 20/2 ATCA ŠpSS V / 74 ZS 20/2 Konštrukcia telekomunikačných zariadení ŠpSS V / 76 ATCA AdvancedTCA Backplane (Advanced Telecommunications Computing Architecture) Charakteristika Špecifikovala PICMG (PCI Industrial Computer Manufacturers Group) Umožňuje súčasné osadenie procesorovými, DSP, sieťovoprocerovými p ý ((NP), ), p pamäťovými ý a vstupno/výstupnými p ý p ý modulmi Podporuje rozhrania do 40 Gbit/s Zabezpečuje 99,999% spoľahlivosť Zóna Slúži na Redundantné napájanie 48Vdc Shelf manažment Veľkosť dosky 322 x 280 mm (V x H) 4 dosiek / 9 stojan 6 dosiek / ETSI stojan Napájanie: -48Vdc ZS 20/2 ŠpSS V / 75 ZS 20/2 ŠpSS V / 77
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